Physical activity is an important component of healthful living. (9 points) a. Contrast a physically active lifestyle with a sedentary lifestyle.

b. Name a short-term consequence of a sedentary lifestyle.

c. Explain how this short-term consequence may lead to a long-term health concern.

Be as specific as possible about the nature of the long-term health concern, and analyze a possible cause of it.

Which of the following is a health risk associated with ground-level ozone? a.cataractsb.skin cancerc.respiratory illnessd.all of the above

According to proper standing posture, from a side view, which parts of the body should be aligned? a. ear, shoulder, hip, knee, and ankle b. stomach, hip, knee, and ankle c. nose, shoulder, hip, knee d. ear, shoulder, fingers, ankle

Which of the following processes within viral replication is the greatest source of genetic variation in rna virus populations? a) high mutation rate due to lack of proofreading of rna genome replication errors.b) transcription from the host cell rna polymerase introduces numerous mutations.c) capsid proteins from the host cell can replace the viral capsid.d) viral rna is translated by host cell ribosomes.